Maximizing Throughput with Routing Interference Avoidance in RIS-Assisted Relay Mesh Networks

In the modern landscape of wireless communications, multihop, high bandwidth, indoor Terahertz (THz) communications are gaining significant attention. These systems couple Reconfigurable Intelligent Surfaces (RISs) and Relay Nodes (RNs) within the emerging 6G network framework, offering promising solutions for creating cell-less, indoor, and on-demand mesh networks. This paper presents an in-depth, analytical examination of how path allocation impacts interference within such networks. We develop the first model which analyzes interference based on the geometric parameters of beams (conic, cylindrical) as they interact with RISs, User Equipments (UEs), and RNs. We introduce a transmission scheduling heuristic designed to mitigate interference, alongside an efficient routing optimization method to maximize throughput. Our performance results elucidate the interference’s effect on communication path quality and highlight effective path selection strategies with throughput maximization.